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<h2><a href="closure_goog_positioning_clientposition.js.html">clientposition.js</a></h2>

<pre class="prettyprint lang-js">
<a name="line1"></a>// Copyright 2006 The Closure Library Authors. All Rights Reserved.
<a name="line2"></a>//
<a name="line3"></a>// Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);
<a name="line4"></a>// you may not use this file except in compliance with the License.
<a name="line5"></a>// You may obtain a copy of the License at
<a name="line6"></a>//
<a name="line7"></a>//      http://www.apache.org/licenses/LICENSE-2.0
<a name="line8"></a>//
<a name="line9"></a>// Unless required by applicable law or agreed to in writing, software
<a name="line10"></a>// distributed under the License is distributed on an &quot;AS-IS&quot; BASIS,
<a name="line11"></a>// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<a name="line12"></a>// See the License for the specific language governing permissions and
<a name="line13"></a>// limitations under the License.
<a name="line14"></a>
<a name="line15"></a>/**
<a name="line16"></a> * @fileoverview Client positioning class.
<a name="line17"></a> *
<a name="line18"></a> */
<a name="line19"></a>
<a name="line20"></a>goog.provide(&#39;goog.positioning.ClientPosition&#39;);
<a name="line21"></a>
<a name="line22"></a>goog.require(&#39;goog.asserts&#39;);
<a name="line23"></a>goog.require(&#39;goog.math.Box&#39;);
<a name="line24"></a>goog.require(&#39;goog.math.Coordinate&#39;);
<a name="line25"></a>goog.require(&#39;goog.math.Size&#39;);
<a name="line26"></a>goog.require(&#39;goog.positioning&#39;);
<a name="line27"></a>goog.require(&#39;goog.positioning.AbstractPosition&#39;);
<a name="line28"></a>goog.require(&#39;goog.style&#39;);
<a name="line29"></a>
<a name="line30"></a>
<a name="line31"></a>
<a name="line32"></a>/**
<a name="line33"></a> * Encapsulates a popup position where the popup is positioned relative to the
<a name="line34"></a> * window (client) coordinates. This calculates the correct position to
<a name="line35"></a> * use even if the element is relatively positioned to some other element. This
<a name="line36"></a> * is for trying to position an element at the spot of the mouse cursor in
<a name="line37"></a> * a MOUSEMOVE event. Just use the event.clientX and event.clientY as the
<a name="line38"></a> * parameters.
<a name="line39"></a> *
<a name="line40"></a> * @param {number|goog.math.Coordinate} arg1 Left position or coordinate.
<a name="line41"></a> * @param {number=} opt_arg2 Top position.
<a name="line42"></a> * @constructor
<a name="line43"></a> * @extends {goog.positioning.AbstractPosition}
<a name="line44"></a> */
<a name="line45"></a>goog.positioning.ClientPosition = function(arg1, opt_arg2) {
<a name="line46"></a>  /**
<a name="line47"></a>   * Coordinate to position popup at.
<a name="line48"></a>   * @type {goog.math.Coordinate}
<a name="line49"></a>   */
<a name="line50"></a>  this.coordinate = arg1 instanceof goog.math.Coordinate ? arg1 :
<a name="line51"></a>      new goog.math.Coordinate(/** @type {number} */ (arg1), opt_arg2);
<a name="line52"></a>};
<a name="line53"></a>goog.inherits(goog.positioning.ClientPosition,
<a name="line54"></a>              goog.positioning.AbstractPosition);
<a name="line55"></a>
<a name="line56"></a>
<a name="line57"></a>/**
<a name="line58"></a> * Repositions the popup according to the current state
<a name="line59"></a> *
<a name="line60"></a> * @param {Element} movableElement The DOM element of the popup.
<a name="line61"></a> * @param {goog.positioning.Corner} movableElementCorner The corner of
<a name="line62"></a> *     the popup element that that should be positioned adjacent to
<a name="line63"></a> *     the anchorElement.  One of the goog.positioning.Corner
<a name="line64"></a> *     constants.
<a name="line65"></a> * @param {goog.math.Box=} opt_margin A margin specified in pixels.
<a name="line66"></a> * @param {goog.math.Size=} opt_preferredSize Preferred size of the element.
<a name="line67"></a> * @override
<a name="line68"></a> */
<a name="line69"></a>goog.positioning.ClientPosition.prototype.reposition = function(
<a name="line70"></a>    movableElement, movableElementCorner, opt_margin, opt_preferredSize) {
<a name="line71"></a>  goog.asserts.assert(movableElement);
<a name="line72"></a>
<a name="line73"></a>  // Translates the coordinate to be relative to the page.
<a name="line74"></a>  var viewportOffset = goog.style.getViewportPageOffset(
<a name="line75"></a>      goog.dom.getOwnerDocument(movableElement));
<a name="line76"></a>  var x = this.coordinate.x + viewportOffset.x;
<a name="line77"></a>  var y = this.coordinate.y + viewportOffset.y;
<a name="line78"></a>
<a name="line79"></a>  // Translates the coordinate to be relative to the offset parent.
<a name="line80"></a>  var movableParentTopLeft =
<a name="line81"></a>      goog.positioning.getOffsetParentPageOffset(movableElement);
<a name="line82"></a>  x -= movableParentTopLeft.x;
<a name="line83"></a>  y -= movableParentTopLeft.y;
<a name="line84"></a>
<a name="line85"></a>  goog.positioning.positionAtCoordinate(
<a name="line86"></a>      new goog.math.Coordinate(x, y), movableElement, movableElementCorner,
<a name="line87"></a>      opt_margin, null, null, opt_preferredSize);
<a name="line88"></a>};
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